<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
        <title></title>
        <style type="text/css">
            html,
            body {
                width: 100%;
                height: 100%;
                overflow: hidden;
				
            }
            * {
                margin: 0;
                padding: 0;
            }
            .su {
                position: relative;
                width: 300px;
                height: 300px;
                border: 1px solid red;
                margin: 0 auto;
                overflow: hidden;
				
            }
            .lk {
                position: absolute;
                width: 100px;
                height: 100px;
                /* border-radius: 50%; */
                border: 200px solid rgba(0,0,0,0.4);
                top: 50%;
                margin-top: -250px;
                left: 50%;
				z-index: 22222;
                margin-left: -250px;
            }
        </style>
    </head>
    <body>
        <div class="su">
			<div class="">
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			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
			<div class="">
				adsgsdfgsdfgs
			</div>
            <div class="lk"></div>
        </div>
    </body>
</html>